After a solid first season on the LPGA Tour, Porter enter's this week's The ANNIKA sitting in 60th position in the year-long points race.
Only the top 60 will qualify for the $US11 million ($A17 million) Tour Championship in Naples from November 20-23.
Since winning the Webex Players Series at home in Sydney in February, Porter has enjoyed a consistent LPGA Tour campaign highlighted by a fourth-place finish at the Blue Bay LPGA in March.
A 12th top-50 result of the season this week would likely be enough for the 23-year-old to clinch a Tour Championship slot.
World No.5 Minjee Lee, currently third in the standings after adding a third career major to her CV at the 2025 Women's PGA Championship, is resting up this week.
Fellow major champions Grace Kim (30th) and Hannah Green (38th), along with Steph Kyriacou (43rd) have also done enough to qualify but will fine-tune their games at The ANNIKA.
After leading into the final round of the Evian Championship in France where Kim ultimately broke through for her maiden major with a dramatic playoff win over world No.1 Jeeno Thitikul, Gabriela Ruffels (72nd) needs a big week to progress.
As does Robyn Choi (65th), while Karis Davidson (82nd) and Hira Naveed (106th) likely need to win for the first time on the LPGA Tour to scrape into the elite 60-player field.
Defending champion and three-time event winner Nelly Korda is among 14 of the top 25 players in the world teeing up from Thursday at the Pelican Golf Club in Belleair.
Thitikul, the season-long points leader, is sitting it out ahead of her Tour Championship title defence and quest to edge out Lee and Japan's reigning British Open champion Miyu Yamashita for player-of-the-year honours.
